that a variance of o = 23 months (squared) is most desirable for these batter ies. A random samiple uf 22 batteries gave a test the claim that o? - 23 against the clalm that o? is different from 23. What is the level of significance? te the null and alternate hypotheses. DH a = 23; H,: a > 23 DH, o? > 23; H,: o? = 23 O H 2-73; H: <23 O H;i 02-23; H;: 02 = 23 ) Find the value of the chi-square statistic for the sample. (Round your answe to two decimal places.) "hat are the degrees of freedorm? hat assurmptions are you making about the original distribution? O We assume a exponential population distribution.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
Topic Video
Question
(c) Find or estimate the p-value of the sample test statistic,
O p-value > 0.100
O 0.050 < P-value < 0,100
O 0.025 < P-value < 0.050
O 0.010 < p-value < 0.025
O 0.005 < p-value < 0.010
O P-value < 0.005
(d) Based on your answers in parts (a) to (c), will you reject or fail to reject the null hypothesis?
O Since the P-value > a, we fail to reject the null hypothesis.
O Since the P-value > a, we reject the null hypothesis.
O Since the P-value s a, we reject the null hypothesis.
O Since the P-value s a, we fail to reject the null hypothesis.
(e) Interpret your conclusion in the context of the application.
O At the 5% level of significance, there is insufficient evidence to conclude that the variance of battery life is different from 23.
O At the 5% level of significance, there is sufficient evidence to conclude that the variance of battery life is different from 23.
(f) Find a 90% confidence interval for the population variance. (Round your answers to two decimal places.)
lower limit
upper limit
(g) Find a 90% confidence interval for the population standard deviation. (Round your answers to two decimal places.)
lower limit
months
upper limit
months
Transcribed Image Text:(c) Find or estimate the p-value of the sample test statistic, O p-value > 0.100 O 0.050 < P-value < 0,100 O 0.025 < P-value < 0.050 O 0.010 < p-value < 0.025 O 0.005 < p-value < 0.010 O P-value < 0.005 (d) Based on your answers in parts (a) to (c), will you reject or fail to reject the null hypothesis? O Since the P-value > a, we fail to reject the null hypothesis. O Since the P-value > a, we reject the null hypothesis. O Since the P-value s a, we reject the null hypothesis. O Since the P-value s a, we fail to reject the null hypothesis. (e) Interpret your conclusion in the context of the application. O At the 5% level of significance, there is insufficient evidence to conclude that the variance of battery life is different from 23. O At the 5% level of significance, there is sufficient evidence to conclude that the variance of battery life is different from 23. (f) Find a 90% confidence interval for the population variance. (Round your answers to two decimal places.) lower limit upper limit (g) Find a 90% confidence interval for the population standard deviation. (Round your answers to two decimal places.) lower limit months upper limit months
A set of solar batteries is used in a research satellite. The satellite can run on only one battery, but it runs best if more than one battery is used. The variance a2 of lifetimes of these batteries affects the useful
lifetime of the satellite before it goes dead. If the variance is too small, all the batteries will tend to die at once. Why? If the variance is too large, the batteries are simply not dependable. Why? Engineers have
determined that a variance of o? = 23 months (squared) is most desirable for these batter les. A random sample uf 22 batteries gave a sarmple variance of 15.6 months (squared). Using a 0.05 level of
signlficance, test the claim that g?
23 against the claim that o? is different from 23.
(a) What is the level of significance?
State the null and alternate hypotheses.
O H,: a = 23; H, o?> 23
O H o? > 23; H,: o? = 23
O H: a? - 23; H, a²< 23
O H,: 02 - 23; H,: 02= 23
(b) Find the value of the chi-square statistic for the sample. (Round your answer to two decimal places.)
What are the degrees of freedorn?
What assurmptions are you making about the original distribution?
O We assume a exponential population distribution.
O We assume a uniform population distribution.
O We assume a binomial population distribution.
O We assume a normal population distribution.
(c) Find or estimate the P-value of the sample test statistic.
OP value > 0.100
O 0.050 < P-value < 0.100
O 0.025 < P-value < 0.050
11:01 AM
P Type here to search
75°F Mostly sunny
7/30/2021
Transcribed Image Text:A set of solar batteries is used in a research satellite. The satellite can run on only one battery, but it runs best if more than one battery is used. The variance a2 of lifetimes of these batteries affects the useful lifetime of the satellite before it goes dead. If the variance is too small, all the batteries will tend to die at once. Why? If the variance is too large, the batteries are simply not dependable. Why? Engineers have determined that a variance of o? = 23 months (squared) is most desirable for these batter les. A random sample uf 22 batteries gave a sarmple variance of 15.6 months (squared). Using a 0.05 level of signlficance, test the claim that g? 23 against the claim that o? is different from 23. (a) What is the level of significance? State the null and alternate hypotheses. O H,: a = 23; H, o?> 23 O H o? > 23; H,: o? = 23 O H: a? - 23; H, a²< 23 O H,: 02 - 23; H,: 02= 23 (b) Find the value of the chi-square statistic for the sample. (Round your answer to two decimal places.) What are the degrees of freedorn? What assurmptions are you making about the original distribution? O We assume a exponential population distribution. O We assume a uniform population distribution. O We assume a binomial population distribution. O We assume a normal population distribution. (c) Find or estimate the P-value of the sample test statistic. OP value > 0.100 O 0.050 < P-value < 0.100 O 0.025 < P-value < 0.050 11:01 AM P Type here to search 75°F Mostly sunny 7/30/2021
Expert Solution
steps

Step by step

Solved in 4 steps

Blurred answer
Knowledge Booster
Hypothesis Tests and Confidence Intervals for Means
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman